Beecroft Institute for Particle Astrophysics and Cosmology

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Galaxy Zoo: Major Galaxy Mergers Are Not a Significant Quenching Pathway

ASTROPHYSICAL JOURNAL 845:2 (2017) ARTN 145

Authors:

AK Weigel, K Schawinski, N Caplar, A Carpineti, RE Hart, S Kaviraj, WC Keel, SJ Kruk, CJ Lintott, RC Nichol, BD Simmons, RJ Smethurst
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Calibrating photometric redshifts with intensity mapping observations

PHYSICAL REVIEW D 96:4 (2017) ARTN 043515

Authors:

D Alonso, PG Ferreira, MJ Jarvis, K Moodley
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hi_class: Horndeski in the Cosmic Linear Anisotropy Solving System

JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS (2017) ARTN 019

Authors:

M Zumalacarregui, E Bellini, I Sawicki, J Lesgourgues, PG Ferreira
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The Python Sky Model: software for simulating the Galactic microwave sky

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 469:3 (2017) 2821-2833

Authors:

B Thorne, J Dunkley, D Alonso, S Næss
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Galaxy-halo alignments in the Horizon-AGN cosmological hydrodynamical simulation

Monthly Notices of the Royal Astronomical Society (2017)

Authors:

NE Chisari, N Koukoufilippas, A Jindal, S Peirani, RS Beckmann, S Codis, J Devriendt, L Miller, Y Dubois, C Laigle, A Slyz, C Pichon

Abstract:

Intrinsic alignments of galaxies are a significant astrophysical systematic affecting cosmological constraints from weak gravitational lensing. Obtaining numerical predictions from hydrodynamical simulations of expected survey volumes is expensive, and a cheaper alternative relies on populating large dark matter-only simulations with accurate models of alignments calibrated on smaller hydrodynamical runs. This requires connecting the shapes and orientations of galaxies to those of dark matter haloes and to the large-scale structure. In this paper, we characterise galaxy-halo alignments in the Horizon-AGN cosmological hydrodynamical simulation. We compare the shapes and orientations of galaxies in the redshift range $0
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